Switched reluctance motor rotor position estimation method based on unsaturated inductance reconstruction

• Main Authors: YU DONGSHENG, LU ZHE, LIN HANG, HAN GUOQIANG, WU MENGLIN, HONG JINGWEI, ZHU BEIBEI, LI WEIDONG
• Format: Patent
• Language: Chinese; English
• Published: 01.04.2022
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses a switched reluctance motor rotor position estimation method based on unsaturated inductance reconstruction, and the method comprises the steps: calculating the difference value between the unsaturated inductance and apparent inductance of a motor in real time through a similar triangle solving algorithm, and reconstructing the unsaturated inductances in a 7.5-15-degree region, a 22.5-30-degree region and a 37.5-45-degree region; and then unsaturated virtual inductances in an area from 0 degree to 7.5 degrees, an area from 15 degrees to 22.5 degrees and an area from 30 degrees to 37.5 degrees are calculated by utilizing a linear regression analysis algorithm, the position of a motor rotor at any moment is calculated according to the reconstructed unsaturated inductances and virtual inductances, and the rotating speed of the motor is calculated according to the calculated position of the motor rotor. The method can effectively avoid the influence of motor saturation on the rotor positio